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Image processing apparatus and image processing method

a technology of image information and image processing apparatus, which is applied in the direction of 2d-image generation, digital transmission, instruments, etc., can solve the problems of difficult automatic determination of the most appropriate transparency degree, inability to safely determine the effective information exists, and hidden image information in the region corresponding to the region of electronic signature, so as to prevent deterioration in character visibility

Inactive Publication Date: 2014-08-26
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to prevent confusion when reading electronic files by adding a visible electronic signature. The invention arranges the characters in a way that doesn't interfere with the visibility of the signature. This improves the overall quality of the file and ensures easy reading for users.

Problems solved by technology

The visible electronic signature has an advantage that the electronic signature can be viewed visually and in contrast, a disadvantage that image information in a region corresponding to the region of the electronic signature is hidden.
However, a method of changing the arrangement of the visible electronic signature, a method of reducing a size of the visible electronic signature or a method of processing the visible electronic signature to be translucent has the following problems.
However, such a region does not necessarily exist in all the image data.
In a case of the method of reducing the size of the visible electronic signature, it can not be safely determined that the effective information does not exist in a region of the reduced visible electronic signature.
Therefore, it is difficult to automatically determine the most appropriate transparency degree.
Therefore, even if the visible electronic signature is processed to be translucent, since visibility of all or a part of characters contained in a region overlapping with a region of the visible electronic signature remarkably deteriorates, it is difficult for a receiver of the electronic file to perform visual check of characters, leading to the possibility that the important information can not be transmitted to the receiver.

Method used

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  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method

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Experimental program
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first embodiment

[0029]FIG. 1 is a block diagram showing an arrangement example of an image processing device according to a first embodiment.

[0030]An image processing device 10 is provided with a CPU 101, a RAM 102, a hard disc 103, a user command input unit 104, an image reading unit 105, a character image extraction processing unit 106, and a main bus 108. The hard disc 103 stores programs, files and so on. The user command input unit 104 inputs various types of settings by a user. The character image extraction processing unit 106 extracts a character image data from the read image. The CPU 101 controls the RAM 102, the hard disc 103, the user command input unit 104, the image reading unit 105 and the character image extraction processing unit 106 according to the program. The CPU 101 is included in a control unit (not shown) for comprehensively controlling the whole image processing device.

[0031]FIG. 2 is a flow chart showing a flow of control in the image processing device according to the fir...

second embodiment

[0041]FIG. 6 is a block diagram showing an arrangement example of an image processing device according to a second embodiment.

[0042]An image processing device 60 is provided with a CPU 601, a RAM 602, a hard disc 603, a user command input unit 604, an image reading unit 605, a character image extraction processing unit 606, a translucent-processed processing unit 607, a main bus 608, and a region separating unit 609. The hard disc 603 stores programs, files and so on. The user command input unit 604 inputs various types of settings by a user. The character image extraction processing unit 606 extracts a character image data from the read image. The translucent-processed processing unit 607 performs processing of making an image translucent. The region separating unit 609 separates an image region (a region of a picture or an illustration) and a character region from the image data. The CPU 601 controls the RAM 602, the hard disc 603, the user command input unit 604, the image readin...

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Abstract

Upon adding a visible electronic signature to an electronic file, deterioration in visibility of characters is prevented by arranging a character image data of a portion overlapping with a region of the visible electronic signature in an upper position layer above the visible electronic signature. There are included a step for extracting a character image data from an image data, a step for generating a character image layer data in which only the character image data is described on a transparent background if a region where the visible electronic signature is arranged and the region of the character image data overlap with each other, and a step for generating an electronic file with a layered structure having the character image layer data, the visible electronic signature and the image data in that order from an upper position of the layered structure.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an image processing apparatus and an image processing method, and particularly, to an image processing apparatus and an image processing method which add a visible electronic signature to an electronic file generated from a read image.[0003]2. Description of Related Art[0004]In recent years, the importance of detecting whether or not an electronic file received from a producer of the electronic file is altered dishonestly has been increasing. An electronic signature can be used as a method of detecting such a dishonest alternation. The electronic signature is a method in which a hash value of an electronic file is calculated, the hash value is encrypted by a secret key which is produced by an open key cipher system, and the encrypted hash value is accessible only by the producer and is provided as an electronic signature to the electronic file. A receiver of the electronic file decrypts ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G06F17/00G06T11/00
CPCG06T11/00
Inventor ISODA, TAKASHI
Owner CANON KK